Peeling capsule with integrated care effect

ABSTRACT

A cosmetic capsule which can be topically applied and rubbed in and comprises a casing material and a filling material enclosed by the casing material. The casing material is composed of an emulsion which comprises one or more waxes that are solid above 25° C. and the filling material comprising a preparation which has an abrasive effect and comprises one or more abrasive peeling agents which are present in an oil or lipid mixture, a surfactant-containing preparation or an emulsion.

The invention relates to a capsule that can be applied topically, comprising an emulsion-based casing material and a filling material which contains a preparation having an abrasive effect.

The epidermis is composed of different types of cells: the germ layer (stratum germinativum), the granular layer (stratum granulosum) and the horny layer (stratum corneum). In the germ layer new cells are formed by division which migrate permanently to the skin's surface. On the way there, in the granular layer, they keratinize and decay. These decayed horny cells comprise as horny columns most of the cells in the skin. Within 28 days the epidermis has renewed itself once. Usually the dead horny cells are detached gradually unnoticed and by themselves.

On very stressed body parts and/or body parts exposed to weather/environmental effects, such as, e.g., hands, feet, elbows, face or knees, as well as in the case of very dry skin, horny scales can accumulate increasingly, which do not detach by themselves and thus lead to unattractive, dull and even in part lacerated skin.

There are various ways of ridding the skin of these superfluous horny scales. On the one hand, there are various tools, such as pumice stones, washcloths or loofahs. On the other hand, it is widespread to rub the skin with loose granules, such as, e.g., sand, salt, sugar or wheat germ. Furthermore, there are cosmetic preparations, such as wash peelings, which in most cases contain abrasive plastic particles. In order to be able to cleanse the skin, surfactants are added to most wash peelings. However, these surfactants remove not only the plastic particles, but also endogenous lipids that are located on the skin and thus after use lead often to a tightening and itching of the skin.

The tightening and itchy skin feeling can be avoided by adding oils or lipids to the cosmetic peeling preparation. One example of particularly regreasing peeling preparations are oil/salt mixtures and wash emulsions.

Salt slurries in oil for use as a peeling preparation have been known to the consumer for some time (example: “Groβmutters Hausmittel, neu entdeckt,”© 2000 Reader's Digest, Verlag Das Beste GmbH, Stuttgart, Zürich, Vienna). Mixtures of this type are likewise commercially available as cosmetic finished products (example: Alessandro® Hands! Up Magic Manicure®). The fine salt particles in these mixtures over time settle to the bottom of the container and form a visible salt layer there. The mixing of the two phases can be very time-consuming and strength-consuming depending on the size of particles of the salt used. It is often not possible to achieve a uniform blending of the product, which means that the oil is used up more quickly. A virtually dry and solid salt layer on the bottom of the container is left behind, which can no longer be used.

Approaches to rectify this situation are presented in documents WO 00/04867 and U.S. Pat. No. 5,866,145 concerning emulsion capsules.

It would be desirable to provide a product that renders possible both a skin peeling and a skin care in one step.

The invention therefore comprises a capsule that can be topically applied and rubbed onto the skin, comprising an emulsion-based casing material and a filling material which contains a preparation which has an abrasive effect and comprises one or more abrasive peeling agents.

The peeling agents are contained either in

-   -   a) an oil or lipid mixture, which at 25° C. has a viscosity         between 3 and 50,000 mPa*s, preferably between 1000 and 8000 and         very particularly preferably between 2000 and 4000 mPa*s,     -   b) a surfactant-containing preparation or     -   c) an emulsion.

The casing material surrounds the filling material and comprises one or more waxes, which are solid below 40° C. The exterior casing thus receives its strength for pouring, removing and a corresponding storage stability.

As preferred waxes are selected Synwax 80, a synthetic wax, cetyl palmitate, C20-40 alkyl stearate, cera alba, beeswax, sunflower seed wax (helianthus annuus seed wax), C18-36 acid triglaceride, cera microcristallina, paraffin wax, candelilla cera and/or cetyl ricinoleate.

The topically applicable capsule is a capsule that at room temperature is solid, semi-solid or stable in form, which can thus be portioned and handled separately.

Many terms such as “balls,” “capsules,” “capsule-form preparation” or “beads” can basically be used to describe the capsules according to the invention, even if different meanings are assigned to these terms under some circumstances. In particular the meaning of the term “capsule” is here not limited to the precisely defined forms, production methods, contents and application possibilities of the pharmaceutical preparations also called “capsules,” but includes them. In general according to the invention a capsule is an object that is, for example, approximately round or ellipsoid, and clearly distinguishable from its surroundings, which with light pressure and, for example, by grasping during removal from a packaging, changes its shape only insignificantly.

The capsule-form preparations according to the invention can have any shape, but preferably they are spherical with a volume of 0.1 to 20 ml.

The capsules according to the invention have a size, i.e., average diameter, of 3, preferably 5, to 40 mm. The capsules can thus be handled and applied individually.

The capsule-form preparations according to the invention are stable in form as dragées, capsules, balls or hollow balls during storage and removal.

According to the invention, the capsule casing, the casing material, is constituted by an emulsion. Due to the fact that the casing material is present on an emulsion basis, when the capsule according to the invention is rubbed on the skin a distribution occurs such as that to which the user is accustomed with emulsion-based creams.

The filling material can likewise be formulated as emulsion c.). The filling is then advantageously an O/W, W/O, W/O/W emulsion, a microemulsion or a nano-emulsion. The emulsion filling material can comprise all of the substances and preparations known in cosmetics, in particular O/W or W/O/W, W/O emulsions in the form of creams are advantageous.

The emulsion of the casing differs from the emulsion of the filling in that the emulsion of the filling can contain surfactants and/or active ingredients. Furthermore, the emulsion of the filling can be significantly less viscous.

The advantages of the emulsion-based capsule casing in combination with the filling material according to the invention are:

-   -   No tightening or itching after application     -   Skin is supplied with lipids and moisture     -   Convenience     -   Pleasant feeling on the skin right from the application     -   Milder application     -   The active ingredients/treatment substances are massaged in         right from the application     -   Peeling and skin care in one application

The casing can be produced by known methods.

For example, hollow balls can be cast from melted casing material, which are filled with filling material through a hole in the wall of the ball. Subsequently the hole is closed by a plug of casing material.

Another possibility for production can be carried out by the so-called one-shot method. Casing material and filling material are thereby cast simultaneously. The casting machine meters both masses from the divided reservoir through a concentric ring nozzle into a blister form. First the casing mass starts via the annular gap and then the filling follows with a short delay via the inner nozzle. The finished capsule can thus be cast in one step. This method is the preferred production method according to the invention.

It is also possible to first cast half hollow balls, to then fill them, to match them and subsequently by thermal treatment to fuse the two hollow balls to one another. Furthermore, two hemispheres of this type can be produced, wherein one or both have a hole for subsequent filling, then are fused to form a hollow ball, and subsequently are filled through the filling hole, which is then closed as described above.

The peeling agents (peeling bodies/peeling particles) are preferably selected from the group polyethylene, common salt, sea salt, sodium carbonate, sodium bicarbonate, magnesium sulfate, magnesium chloride, sugar, alum clay, sand, plastic particles, pulverized or ground stones of e.g., walnut shells, apricot, peach or almond stones.

Further peeling agents are known and suitably selected from the group Himalaya salt, plastic particles of viscose, cellulose, polypropylene, polyester, polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE), aramide, nylon, Kevlar, polyvinyl derivatives, polyurethanes, polyactid, polyhydroxyalkanoate, polycarbonate, polystyrene, cellulose ester and/or polyethylene as well as poorly soluble or insoluble crystals, such as, e.g., calcium sulfate, calcium carbonate, encapsulated or unencapsulated crystals such as, e.g., calcium chloride, potassium chloride, magnesium chloride, sugar, silicates such as, e.g., sea sand, alum clay, milk-of-lime, crushed or ground natural products such as, e.g., wheat, flaxseed, rice, corn, almonds, nuts, nutshells, pumpkin seeds, caraway seeds, crushed or ground natural sponges such as, e.g., sponge gourd, natural and synthetic waxes, such as, e.g., rice bran wax, carnauba wax, jojoba wax, beeswax.

Peeling or peeling treatment is a cosmetic treatment in which the surface layers of the skin are removed extensively.

In the case of surface peeling, the uppermost horny layer of the skin is removed mechanically or chemically. This treatment is called peeling colloquially, many providers refer to this method as microdermabrasion.

One or more of these peeling agents are now contained in

-   -   a.) oil or a lipid mixture, which at 25° C. has a viscosity         between 3 and 50,000 mPas, preferably between 1000 and 8000 and         very particularly preferably between 2000 and 4000 mPas, or     -   b.) a surfactant-containing preparation or     -   c.) an emulsion         and surrounded by the capsule casing.

The oil phase or lipid phase a.) in which the peeling agents can be present in suspended or distributed form can be selected from the group of esters of saturated and/or unsaturated, branched and/or unbranched alkanecarboxylic acids having a chain length of from 3 to 30 C atoms and saturated and/or unsaturated, branched and/or unbranched alcohols having a chain length of from 3 to 30 C atoms, as well as the group of the esters of aromatic carboxylic acids and saturated and/or unsaturated, branched and/or branched alcohols of a chain length of 3 to 30 C atoms. Such ester oils can then be advantageously selected from the group including octyl palmitate, ethylhexyl cocoate octylisostearate, octyldodeceyl myristate, cetearyl isononanoate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, stearyl heptanoate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, tridecyl stearate, tridecyl trimellitate, and synthetic, semi-synthetic and natural mixtures of such esters. The oil phase can also be advantageously selected from the group of dialkyl ethers and dialkyl carbonates. The oil phase can also advantageously contain non-polar oils, for example, those selected from the group of branched and unbranched hydrocarbons and hydrocarbonwaxes, especially mineral oil, vaseline (petrolatum), paraffin oil, squalane and squalene, polyolefins, hydrogenated polyisobutenes and isohexadecane, C14-C20 isoparaffins. Among the polyolefins, polydecenes are the preferred substances.

The surfactant-containing preparation b.) comprises in addition to the peeling agent, surfactants or detergent substances.

Surfactants are amphiphilic substances that can dissolve organic, nonpolar substances in water. As a result of their specific molecular structure having at least one hydrophilic and one hydrophobic molecular moiety, they are able to reduce the surface tension of water, wet skin, facilitate the removal and dissolution of dirt, facilitate rinsing and—if desired—control lathering.

Advantageous surfactant-containing mixtures comprise, for example,

-   -   a.) 7.32% by weight of sodium myreth sulfate and 4.47% by weight         of lauryl glucoside as well as water     -   or     -   b.) 2.82% by weight of sodium myreth sulfate, 11.76% by weight         of cocamidopropyl betaine, 4% by weight of decyl glucoside and         water     -   or     -   c.) 1.8% by weight of sodium methyl cocoyl taurate, 6.05% by of         weight sodium laureth sulfate, 1% by weight of decyl glucoside         and water.

According to the invention, unlike the prior art, the casing material is not of gelatine or pure wax, but is emulsion-based.

This advantage that the peeling agent is surrounded by a skin care emulsion, leads to

-   -   skin care effect after rinsing off the product and drying the         face     -   no need to apply face cream after the application     -   face is supplied with regreasing and skin care lipids, which         protect against external influences such as wind, cold, heating         air     -   no itching or tightening of the skin occurs, since the emulsion         has a “calming” effect     -   the time necessary and the number of products are reduced by the         “two in one” product     -   the peeling bodies are better cushioned by the emulsion, i.e.,         fewer skin irritations.

According to the invention an application of a face peeling that can be divided into portions due to the capsule form is offered. The skin care and cleansing product properties are provided combined in one product.

The capsule according to the invention can thus be used for skin peeling and skin care at the same time.

EXAMPLES

The numbers given refer to percentage by weight based in each case on the total mass of the casing or the filling.

A. Casing Material, Emulsion Casings

Example 1 2 3 4 5 Cetyl Palmitate 4.0000 4.0000 4.0000 3.2000 3.2000 Glycerin 5.0000 5.0000 5.0000 5.0000 5.0000 Hexamidine 0.0800 0.0800 0.0800 — — Diisethionate Hydrogenated 28.9267 28.9267 28.9267 23.1100 23.1100 Polydecene Octyldodecanol 29.5933 29.5933 29.5933 23.4800 23.4800 PEG-45/Dodecyl Glycol 1.6000 1.6000 1.6000 1.2800 1.2800 Copolymer Polyglyceryl-3 1.6000 1.6000 1.6000 1.2800 1.2800 Diisostearate Synthetic Wax 8.2000 8.2000 8.2000 6.5500 6.5500 Tocopheryl Acetate 1.0000 1.0000 1.0000 0.8000 0.8000 Water 20.0000 20.0000 20.0000 35.0000 35.0000

B. Examples 6-10 Filler Material:

6. Washing Emulsions with Polyethylene

Acrylates/C10-30 Alkyl Acrylate Crosspolymer 0.6000 BHT 0.0500 Fragrance 1.0000 Glycine Soja (Soybean) Oil + 9.0500 Ricinus Communis (Castor) Seed Oil + Propyl Gallate Hydrolyzed Silk 0.1000 Lauryl Glucoside 4.4700 Methylparaben 0.3500 Mineral Oil 35.0000 Oenothera Biennis (Evening Primrose) Oil 0.1000 Phenoxyethanol 0.8000 Propylparaben 0.3500 Sodium Myreth Sulfate 7.3200 Polyethylene 2.300 Water + Sodium Hydroxide 0.2500 Water q.s. 7. Washing Emulsions with Walnut Shells

Bis-Diglyceryl Polyacyladipate-2 1.5000 Carbomer 0.5000 Ceteareth-20 2.0000 Cetyl Alcohol 2.2000 Cetyl Palmitate 1.0000 Decyl Glucoside 0.2500 Decyl Oleate 1.0000 Fragrance 0.3000 Glycerin 4.3500 Glyceryl Stearate 1.5000 Glycine Soja (Soybean) Oil + 0.2000 Calendula Officinalis Flower Oil Isopropyl Palmitate 7.5000 Lactose + Cellulose + Ultramarines + 0.2500 Hydroxypropyl Methylcellulose + Tocopheryl Acetate Methylparaben 0.2000 Methylpropanediol 2.0000 Mineral Oil 4.5000 PEG-20 Glyceryl Stearate 2.5000 Phenoxyethanol 0.6000 Finely ground walnut shell (peeling) 4.3000 Prunus Amygdalus Dulcis (Sweet Almond) Oil 0.2000 Water 62.8500 Water + Sodium Hydroxide 0.3000 8.

Acrylates/C 10-30 Alkyl Acrylate Crosspolymer 0.6000 BHT 0.0500 Fragrance 1.0000 Glycine Soja (Soybean) Oil + 9.0500 Ricinus Communis (Castor) Seed Oil + Propyl Gallate Hydrolyzed Silk 0.1000 Lauryl Glucoside 4.4700 Methylparaben 0.3500 Mineral Oil 35.0000 Oenothera Biennis (Evening Primrose) Oil 0.1000 Phenoxyethanol 0.8000 Polyethylene 4.3000 Propylparaben 0.3500 Sodium Myreth Sulfate 7.3200 Water 36.2600 Water + Sodium Hydroxide 0.2500

9. Washing Gel

Acrylates/C10-30 Alkyl Acrylate Crosspolymer 0.7500 Benzophenone-4 0.0500 Cocamidopropyl Betaine 11.7600 Decyl Glucoside 4.0000 Fragrance 0.2600 Hydroxypropyl Starch Phosphate + Water 1.0000 Mannitol + Microcrystalline Cellulose + 0.3000 Chromium Hydroxide Green + Lactic Acid Methylparaben 0.3500 PEG-40 Hydrogenated Castor Oil 0.5000 PEG-90 Glyceryl Isostearate + Laureth-2 0.1500 Phenoxyethanol 0.9500 Polyethylene 2.0000 Polyquaternium-10 0.1000 Propylparaben 0.3500 Sodium Myreth Sulfate 2.8200 Water 73.9600 Water + Sodium Hydroxide 0.7000

10. Oil/Salt Filling

BHT 0.0500 Beeswax 0.2500 C18-36 Acid Triglyceride 5.0000 Caprylic/Capric Triglyceride 14.5000 Dicaprylyl Carbonate 14.5000 Fragrance 0.2000 Octyldodecanol 14.5000 Prunus Amygdalus Dulcis (Sweet Almond) Oil 0.2500 Sodium Chloride 50.0000 Stearyl Alcohol 0.2500 Theobroma Cacao (Cocoa) Seed Butter 0.5000 

1.-3. (canceled)
 4. A cosmetic capsule, wherein the capsule can be topically applied and rubbed in and comprises a casing material and a filling material enclosed by the casing material, the casing material being composed of an emulsion which comprises one or more waxes that are solid above 25° C., and the filling material comprising a preparation which has an abrasive effect and comprises one or more abrasive peeling agents in one of (i) an oil or lipid mixture having a viscosity of from 3 to 50,000 mPa*s at 25° C.; (ii) a surfactant-containing preparation; and (iii) an emulsion.
 5. The capsule of claim 4, wherein the peeling agents are present in (i).
 6. The capsule of claim 5, wherein (i) has a viscosity of from 1,000 to 8,000 mPa*s at 25° C.
 7. The capsule of claim 5, wherein (i) has a viscosity of from 2,000 to 4,000 mPa*s at 25° C.
 8. The capsule of claim 4, wherein the peeling agents are present in (ii).
 9. The capsule of claim 8, wherein (ii) comprises sodium myreth sulfate, lauryl glucoside and water.
 10. The capsule of claim 8, wherein (ii) comprises sodium myreth sulfate, cocamidopropyl betaine, decyl glucoside and water.
 11. The capsule of claim 8, wherein (ii) comprises sodium methyl cocoyl taurate, sodium laureth sulfate, decyl glucoside and water.
 12. The capsule of claim 4, wherein the peeling agents are present in (iii).
 13. The capsule of claim 12, wherein (iii) comprises a O/W, W/O/W or W/O emulsion.
 14. The capsule of claim 13, wherein (iii) is present as a cream.
 15. The capsule of claim 4, wherein the one or more peeling agents comprise one or more agents selected from polyethylene, common salt, sea salt, sodium carbonate, sodium bicarbonate, magnesium sulfate, magnesium chloride, sugar, alum clay, sand, plastic particles, pulverized or ground walnut shells, pulverized or ground apricot stones, pulverized or ground peach stones, and pulverized or ground almond stones.
 16. The capsule of claim 4, wherein the capsule is substantially spherical in shape.
 17. The capsule of claim 16, wherein the capsule has a volume of at least 0.1 ml.
 18. The capsule of claim 17, wherein the capsule has a volume of not more than 20 ml.
 19. A plurality of capsules of claim 4, wherein the capsules have an average diameter of at least 3 mm.
 20. A plurality of capsules of claim 4, wherein the capsules have an average diameter of at least 5 mm.
 21. The capsule of claim 4, wherein the one or more waxes are solid below 40° C.
 22. A cosmetic capsule, wherein the capsule can be topically applied and rubbed in and comprises a casing material and a filling material enclosed by the casing material, the casing material being composed of an emulsion which comprises one or more waxes that are solid above 25° C., and the filling material comprising a preparation which has an abrasive effect and comprises one or more abrasive peeling agents in one of (i) an oil or lipid mixture having a viscosity of from 2,000 to 4,000 mPa*s at 25° C.; (ii) a surfactant-containing preparation comprising one or more of sodium myreth sulfate, lauryl glucoside, cocamidopropyl betaine, decyl glucoside, sodium methyl cocoyl taurate, and sodium laureth sulfate; and (iii) a O/W, W/O/W or W/O emulsion.
 23. A method of simultaneous skin peeling and skin care, wherein the method comprises applying to skin a plurality of the capsules of claim
 4. 